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Finding the Fourth Proportional to 354,454.71, 489,176.63 and 201,540.89

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Solution

The fourth proportional to 354,454.71, 489,176.63 and 201,540.89 is: 278,142.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,454.71 : 489,176.63 = 201,540.89 : x
  2. Step 2: Convert to fraction form
    354,454.71/489,176.63 = 201,540.89/x
  3. Step 3: Cross multiply
    354,454.71x = 489,176.63 × 201,540.89
  4. Step 4: Simplify right side
    354,454.71x = 98,589,089,923.81
  5. Step 5: Solve for x
    x = 98,589,089,923.81/354,454.71
  6. Step 6: Final answer
    x = 278,142.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.